Provided are cyclic peptide analogs, conjugates comprising such compounds, and pharmaceutical compositions comprising such compounds and conjugates, and methods of treating cancer with such compounds and conjugates.
Provided are cyclic peptide analogs, conjugates comprising such compounds, and pharmaceutical compositions comprising such compounds and conjugates, and methods of treating cancer with such compounds and conjugates.
Kulokekahilide-2, a Cytotoxic Depsipeptide from a Cephalaspidean Mollusk <i>Philinopsis speciosa</i>
作者:Yoichi Nakao、Wesley Y. Yoshida、Yuuki Takada、Junji Kimura、Liu Yang、Susan L. Mooberry、Paul J. Scheuer
DOI:10.1021/np049949f
日期:2004.8.1
A cytotoxic depsipeptide, kulokekahilide-2 (1), was isolated from a cephalaspidean mollusk, Philinopsis speciosa. The structure elucidation of kulokekahilide-2 was carried out by spectroscopic analysis and chemical degradation. Kulokekahilide-2 showed potent cytotoxicity against several cell lines (P388, SKOV-3, MDA-MB-435, and A-10 with IC50 values ranging from 4.2 to 59.1 nM) indicating cancer cell selectivity.
Stereocontrolled Synthesis of the C21–C38 Fragment of the Unnatural Enantiomer of the Antibiotic Nystatin A1
作者:Thilo Berkenbusch、Reinhard Brückner
DOI:10.1002/chem.200305540
日期:2004.3.19
The C(21)-C(38) fragment all-trans-41 of the unnaturalenantiomer 1 of nystatin A(1) was prepared starting from the N-propionyl oxazolidinone 9. Aldol adduct ent-8 (ee > 96 %) derived in two steps was hydroborated with (thexyl)BH(2). Oxidative work-up and treatment with acid furnished delta-lactone 4. It contains the complete stereotetrade of the target molecule. The alpha,beta-unsaturated ester 28